void set_container(Container &);
void set_margin(const Sides &);
+
+ /** Sets the default spacing between widgets in bothg directions. */
void set_spacing(unsigned);
+
+ /** Sets the default vertical spacing between widgets. Affects the ABOVE
+ and BELOW constraints. */
void set_row_spacing(unsigned);
+
+ /** Sets the default horizontal spacing between widgets. Affects the
+ LEFT_OF and RIGHT_OF constraints. */
void set_column_spacing(unsigned);
void add_widget(Widget &);